mirror of
https://github.com/intel/linux-sgx
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Li, Xun
103 lines
4.1 KiB
C
103 lines
4.1 KiB
C
/*
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* Copyright (C) 2011-2020 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _SGX_SECURE_ALIGN_API_H_
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#define _SGX_SECURE_ALIGN_API_H_
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#include <stdint.h>
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typedef struct
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{
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size_t offset;
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size_t len;
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} align_req_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* sgx_aligned_malloc
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*
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* Allocates memory for a structure on a specified alignment boundary
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*
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* Parameters:
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* size - the size of the requested memory allocation in bytes.
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* alignment - the alignment value, which must be an integer power of 2.
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* data - (offset, length) pairs to define the fields in the structure for secrets
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* If data is NULL and count is 0, the whole structure will be aligned.
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* count - number of align_req_t structure in data
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* If data is NULL and count is 0, the whole structure will be aligned.
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*
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* Return Value:
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* A pointer to the memory block that was allocated or NULL if the operation failed.
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*/
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void *sgx_aligned_malloc(size_t size, size_t alignment, align_req_t *data, size_t count);
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/**
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* sgx_aligned_free
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*
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* Frees a block of memory that was allocated with sgx_aligned_malloc
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*
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* Parameters:
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* ptr - a pointer to the memory block that was returned to the sgx_aligned_malloc
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*
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*/
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void sgx_aligned_free(void *ptr);
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/*
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* sgx_get_aligned_ptr
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*
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* Return a pointer from the pre-allocated memory on a specified alignment boundary
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*
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* Parameters:
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* raw - the memory allocated by user
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* raw_size - the size of raw memory in bytes
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* allocate_size - the size of the requested memory allocation in bytes.
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* alignment - the alignment value, which must be an integer power of 2.
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* data - (offset, length) pairs to define the fields in the structure for secrets
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* If data is NULL and count is 0, the whole structure will be aligned.
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* count - number of align_req_t structure in data
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* If data is NULL and count is 0, the whole structure will be aligned.
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* Return Value:
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* A pointer to the memory block or NULL if the operation failed.
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* Note:
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* The raw memory should be allocated by user, and it should be big enough to get aligned pointer:
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* (size + 72)(bytes), if alignment <= 8
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* (size + 64 + alignment)(bytes), if alignment > 8
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*
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*/
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void *sgx_get_aligned_ptr(void *raw, size_t raw_size, size_t allocate_size, size_t alignment, align_req_t *data, size_t count);
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#ifdef __cplusplus
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}
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#endif
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#endif
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